US3987774A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Supplementary fuel injection apparatus for the internal combustion engine
Assignee: Individual
•
Filing: 1975-11-26
•
Granted: 1976-10-26
•
Expires: 1995-11-26
Abstract
Abstract A supplementary fuel injection apparatus for an internal combustion engine comprising a pressure type fuel reservoir member having pressure supplied by the engine exhaust gas, a chambered fuel pump and metering regulator member tubularly connected to said reservoir and having a fuel chamber and a vacuum chamber, a diaphragm therebetween, diaphragm fuel pump means in said vacuum chamber that is power actuated by vacuum pressure supplied from the engine intake manifold, and a fuel distribution unit having a fuel passage connected to said fuel pump and metering regulator unit and the carburetor of the said engine and said unit having a fuel control means therealong and a variable fuel pressure metering means mounted on the carburetor adjacent the venturi thereof.
Inventors
- 👤 Norman E. Waag
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 06:21
CPC Classifications
F; F02; F02M; F02M25/00; F02M25/14; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
331 words
A supplementary fuel injection apparatus for an internal combustion engine comprising: a. a pressure type fuel reservoir member mounted adjacent the carburetor of the combustion engine and having therein a fuel receiving opening and fuel passage outlet, an exhaust gas passage tube from the engine exhaust manifold connected thereto, and exhaust gas pressure control means mounted thereon, b. a diaphragm fuel pump and metering regulator member, a chambered housing therefor and having therein a fuel chamber and a vacuum chamber, an elastomeric non-corrosive pressure action fuel pump diaphragm mounted in said housing between said fuel and vacuum chambers and forming a common wall for said chambers and fuel pump means therefor, and said fuel chamber having a fuel metering inlet and outlet control means mounted in ports in the housing wall thereof, said inlet means port having a fuel passage inlet tube mounted therein and connected to said reservoir fuel passage outlet, the said vacuum chamber having a diaphragm pump action control means mounted therein and a vacuum passage tube having one end mounted therein and the other end connected to the engine intake manifold to supply a less than air pressure vacuum power to actuate the said fuel pump diaphragm, and c. a fuel passage distribution member having a first fuel passage tube connected to said housing fuel outlet port, a fuel passage flow control means connected to said first fuel passage tube and mounted thereon, a fuel nozzle mounted on the engine carburetor adjacent the venturi thereof, a variable fuel pressure metering means connected to said fuel nozzle and a second fuel passage tube connected to said fuel passage flow control means and extending to a connection with said fuel nozzle, whereby said fuel passage distribution member provides a fuel passage for supplementary fuel from said housing of the diaphragm fuel pump and metering regulator member to the engine carburetor for the injection of said fuel into the carburetor venturi and for mixture with regular engine fuel brought thereto.
Claim 2
Dependent Claim
331 words
A supplementary fuel injection apparatus for an internal combustion engine comprising: a. a pressure type fuel reservoir member mounted adjacent the carburetor of the combustion engine and having therein a fuel receiving opening and fuel passage outlet, an exhaust gas passage tube from the engine exhaust manifold connected thereto, and exhaust gas pressure control means mounted thereon, b. a diaphragm fuel pump and metering regulator member, a chambered housing therefor and having therein a fuel chamber and a vacuum chamber, an elastomeric non-corrosive pressure action fuel pump diaphragm mounted in said housing between said fuel and vacuum chambers and forming a common wall for said chambers and fuel pump means therefor, and said fuel chamber having a fuel metering inlet and outlet control means mounted in ports in the housing wall thereof, said inlet means port having a fuel passage inlet tube mounted therein and connected to said reservoir fuel passage outlet, the said vacuum chamber having a diaphragm pump action control means mounted therein and a vacuum passage tube having one end mounted therein and the other end connected to the engine intake manifold to supply a less than air pressure vacuum power to actuate the said fuel pump diaphragm, and c. a fuel passage distribution member having a first fuel passage tube connected to said housing fuel outlet port, a fuel passage flow control means connected to said first fuel passage tube and mounted thereon, a fuel nozzle mounted on the engine carburetor adjacent the venturi thereof, a variable fuel pressure metering means connected to said fuel nozzle and a second fuel passage tube connected to said fuel passage flow control means and extending to a connection with said fuel nozzle, whereby said fuel passage distribution member provides a fuel passage for supplementary fuel from said housing of the diaphragm fuel pump and metering regulator member to the engine carburetor for the injection of said fuel into the carburetor venturi and for mixture with regular engine fuel brought thereto.
Claim 3
Dependent Claim
31 words
The supplementary fuel injection apparatus of claim 1 in which the reservoir exhaust gas pressure control means is a pop-off relief valve mounted thereon above the fuel level of the reservoir.
Claim 4
Dependent Claim
130 words
The supplementary fuel injection apparatus of claim 1 in which the fuel chamber's fuel metering inlet control means is a fuel inlet check valve and the outlet control means is a fuel outlet check valve thereby permitting the power stroke of the vacuum powered diaphragm pump to charge fuel into said fuel chamber and thereafter on the pump's return stroke to eject the fuel downstream therefrom to the engine carburetor in response to a variable vacuum present in the said vacuum chamber, and permitting the exhaust gas pressure in the fuel reservoir to cause a flow of fuel into and out of said fuel chamber downstream to the engine carburetor while the said diaphragm is at rest and the exhaust gas pressure from said engine is present in said reservoir.
Claim 5
Dependent Claim
103 words
The fuel injection apparatus of claim 1 in which the vacuum chamber diaphragm pump action control means is a calibrated spring mounted in the housing wall thereof and centrally abutting the diaphragm, the said spring having a compression factor sufficient to hold the diaphragm in its normal position when the vacuum is absent or low in said chamber and to permit the diaphragm to compress said spring when the vacuum therein is high whereby the volume in said chamber is reduced and thus creates a partial vacuum in the adjoining fuel chamber which in turn is overcome by receiving fuel from the reservoir.
Claim 6
Dependent Claim
35 words
The fuel injection apparatus of claim 1 in which the fuel passage flow control means in the fuel passage distribution member is an electric shut-off solenoid and a kill switch connected to the engine ignition.
Claim 7
Dependent Claim
36 words
The fuel injection apparatus of claim 1 in which the variable fuel pressure metering means in the fuel passage distribution member is a metering jet orifice attached to the nozzle adjacent the fuel tube connection thereof.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-10-26 | 1980-04-26 | 1980-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-10-26 | 1984-04-26 | 1984-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-10-26 | 1988-04-26 | 1988-10-26 | $7700.00 | Window Closed / Lapsed |